The passage implies that medicine in an osmotic pump pill will leave the pill when ______.A．the pill is swallowedB．the medicine is dissolved with water from the bodyC．enough pressure builds up in the pillD．the cellulose coating is dissolved
The passage implies that medicine in an osmotic pump pill will leave the pill when ______.
A．the pill is swallowed
B．the medicine is dissolved with water from the body
C．enough pressure builds up in the pill
D．the cellulose coating is dissolved
相关考题：
It was nearly an hour before the sleeping pill took ___________ . A.effectB.actionC.forceD.place
Part ADirections: Read the following three texts. Answer the questions on each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET 1.Medicine comes in many forms. In its liquid form, medicine affects the body very quickly. But the effects of liquid medicine arch' t usually long-lasting. This is why pills and capsules (胶囊) are also used.The pills and capsules being sold today arch' t perfect, either. Pills dissolve in the stomach. The medicine in the pills is released when the pills dissolve. But often, the pills dissolve too quickly.Scientists have been trying to develop a pill that can release medicine slowly over a long period of time. They have applied their knowledge of plants to produce the "osmotic (渗透的) pump pill".The cell walls of plants are made of cellulose (纤维素). Cellulose is a very porous substance. Their holes are big enough to allow water through the cell walls. As water enters a cell, pressure builds up in the cell. The pressure pumps other substances out of the cell. These substances leave the cell through the cellulose wall. This slow, steady process is called osmosis.The osmotic pump pill is coated with synthetic cellulose. Liquid medicine is contained in the pill. The holes in the cellulose coating of the pill are big enough to allow water in the pill. As water from the body enters the pill, pressure builds up in the pill. The medicine is then slowly pumped out of the pill.The passage implies that the osmotic pump pill is better than other pills and capsules because______.A．it releases medicine slowly over a long period of timeB．it helps to build pressure in the bodyC．the medicine in the pill can affect the body quicklyD．the coating doesn't dissolve in the stomach
The way that the osmotic pump pill works is based on a process called______.A．synthesisB．pressureC．celluloseD．osmosis
The passage implies that cellulose is a very porous substance because it contains______.A．a substance that creates pressureB．millions of tiny holesC．a substance that dissolves itD．liquid medicine
We can infer by this label that ______.A．the medicine could cause some people to feel nervousB．children may take the same dosage as adults takeC．one may not take this medicine before going to bedD．the medicine is liquid
The water in an auxiliary boiler should be tested for chloride content to determine ( ).A.total dissolved solidsB.salt contaminationC.water harcnessD.chlorine contamination
A portable dry chemical fire extinguisher discharges by ______.A.gravity when the extinguisher is turned upside downB.pressure from a small CO2 cartridge on the extinguisherC.air pressure from the hand pump attached to the extinguisherD.pressure from the reaction when water is mixed with the chemical
共用题干I don't think there is anything wrong with your blood.______(46).If you don't sleep for hours during the early part of the evening,you would be more ready to sleep at bedtime.If you didn't nap after dinner,you would not want to stay up so late,and you would not feel the need to take a sleeping pill.______(47).This helps account for the fact that you feel tired all day.You should get out of the habit of sleeping during the evening. Right after your evening meal,engage in some sort of physical activity一a sport such as bowling,perhaps.______(48).Then go to bed at your usual time or a little earlier,and you should be able to get a good night's rest without taking a pill.If you can get into the habit of spending your evenings this way,I am sure you will feel less tired during the day.______(49).If so,get up and watch television or do some jobs around your house until you feel sleepy.If you fall asleep and then wake up a few hours later,get up but do not take a sleeping pill.Read a while or listen to the radio,and make yourself a few hours' sleep that night.You will feel better in the morning than you usually feel after taking a pill.______ (50).The most important thing is to avoid taking that nap right after dinner and avoid taking pills.________（50）A:The key to your problem is that long nap after dinnerB:Or get together with friends for an evening of cards and conversationC:At first it may be hard for you to go to sleep without taking a pillD:The next night you will be ready to sleep at an earlier hourE:Having difficulty sleeping is a common problem shared by many people F: The pill is still working in your system when you get up in the morning
Our new diet pill________the people who want to lose weight.satisfies the need ofB.stimulate the demand ofC.arouse the interest ofD.target the market for
共用题干What We Take From and Give to the SeaAs long as we have been on earth,we have used the sea around us.We take things from the ocean,and we give to it.We take fishes from the ocean-millions of kilograms of fish,every year,to feed millions of people.______(46)We take minerals from the ocean.One way to get salt is to place seawater in a shallow basin and leave it until it evaporates.______(47) Much gold and silver drift dissolved in the waters of the sea,too.But the sea does not give them up by simple evaporation.Other gifts from the sea are pearls,sponges and seaweed.Pearls become jewelry.______(48)Seaweed becomes food of many kinds-even candy,and ice cream-as well as medicine.Believe it or not,fresh water is another gift from the sea.We cannot drink ocean water.______(49)But ocean water becomes fresh water when the salts are removed.In the future,we will find ourselves depending more and more on fresh water from the sea.The sea gives us food,fertilizer,minerals,water,and other gifts .What do we give the sea?Garbage.______(50)Huge as it is,the ocean cannot hold all the water we pour into it. Dumping garbage into the ocean is killing off sea life.Yet as the world population grows,we may need the sea and its gifts more than ever.We are finally learning that if we destroy our sea,we might also destroy ourselves.Hopeful-ly,it is not too late.______(48)A: Natural sponges become cleaning aids.B: We pollute the ocean when we use it as a garbage dump.C: The area of the sea is becoming smaller and smaller.D: Along with salt,other minerals are left after evaporation.E: We even use their bones for fertilizer.F: Some of its contents may cause illness.
共用题干What We Take From and Give to the SeaAs long as we have been on earth,we have used the sea around us.We take from the ocean,and we give to it.We take fishes from the ocean-millions of kilograms of fish,every year,to________(51)millions of people.We even_______(52)their bones for fertilizer.We take minerals from the ocean.One way to get salt is to_______(53)seawater in shallow basin and leave it until it evaporates（蒸发）.Along with salt,other minerals are left_______(54)evaporation.Much gold and silver drift dissolved in the waters of the sea,too.But the sea does not give them_______(55)by simple evaporation.________(56)gifts from the sea are pearls , sponges（海绵）and seaweed.Pearls________(57)jewelry.Natural sponges become cleaning aids.Seaweed becomes______(58)of many kinds一even candy,and ice cream一as well as medicine.Believe it or not,fresh water is another_______(59)from the sea.We cannot drink ocean water.Some of its contents may______(60)illness.But ocean water becomes fresh water when the salts are ________(61).In the future,we will find ourselves．________(62)more and more onfresh water from the sea.The sea_______(63)us food,fertilizer,minerals,water,and other gifts.What do we give the sea?Garbage.We pollute the ocean_______(64)we use it as a garbage dump.Huge as it is,the ocean cannot hold all the water that we pour into it.________(65)garbage into the ocean is killing off sea life.Yet as the world population grows,we may need the sea and its gifts more than ever._________55A:up B:inC:awayD:over
In English, “pill” and “bill” are （）.Aa phonemic contrastBcomplementary distributionCassimilationDa minimal pair
In English, “pill” and “bill” are （）.A、a phonemic contrastB、complementary distributionC、assimilationD、a minimal pair
单选题The sudden reduction of pressure occurring within the crankcase of a refrigeration compressor during starting causes the （）.Asudden evaporation of wax crystals in the lubricantBsudden evaporation of entrapped air in the lubricantCrelease of refrigerant from the oil/refrigerant mixtureDrelease of dissolved lubricant from the refrigerant
单选题The water level in a steaming auxiliary boiler will always （）Arise when the steam pressure is increasedBremain constant as long as the feed pump operatesCfall when the steam pressure is decreasedDvary as the steam demand changes
单选题In a domestic fresh water system, the pump starters are controlled by （） switches which operate when the pressure in the tank varies within predetermined limits as water is drawn off.Awater levelBwater flowCtemperatureDpressure
单选题The domestic fresh water pump starters are controlled by pressure switches which operate when the pressure in the tank varies within predetermined limits as water is drawn offThe word “which” means （）.AstartersBpressure switchesCpressureDwater
问答题If a doctor gives you 3 pills and tells you to take one pill every half hour, how long will it take to take them all?
单选题A portable dry chemical fire extinguisher discharges by（）.Agravity when the extinguisher is turned upside downBpressure from a small CO2 cartridge on the extinguisherCair pressure from the hand pump attached to the extinguisherDpressure from the reaction when water is mixed with the chemical
单选题If a bilge pump failed to build up discharge pressure, you should check for （）.Aexcessive water in the bilgesBa clogged suction strainerCoil in the bilgesDAll of the above
单选题In English, “pill” and “bill” are （）.Aa phonemic contrastBcomplementary distributionCassimilationDa minimal pair
单选题The water in an auxiliary boiler should be tested for chloride content to determine （）.Atotal dissolved solidsBsalt contaminationCwater hardnessDchlorine contamination
单选题The abbreviation "TDS" about the potable water probably means （）.Atotal dissolved solidsBtemperature of distillation of sea waterCtotal dissolved sodiumDtotal delivery system
单选题Which of the following procedures decreases the total dissolved solids concentration in the water of an auxiliary boiler?（）AHydrazine treatment of condensateBFrequent compoundingCChemical cleaningDBottom blowing
单选题The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.Aseawater contaminationBfrequent surface blowsCdissolved oxygen deaerationDfrequent bottom blows
单选题The purpose of an air compressor unloading device is to （）Adrain water from the air receiverBdrain water from the cylindersCdelay the compression process until the motor is up to speedDcheck pump alignment
单选题Where may the passage come from?AAn art bookBA story bookCA science bookDA medicine book